CN207097425U - A kind of LED driver and LED display - Google Patents
A kind of LED driver and LED display Download PDFInfo
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- CN207097425U CN207097425U CN201721090810.6U CN201721090810U CN207097425U CN 207097425 U CN207097425 U CN 207097425U CN 201721090810 U CN201721090810 U CN 201721090810U CN 207097425 U CN207097425 U CN 207097425U
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- led driver
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Abstract
It the utility model is related to a kind of LED driver, and the LED display with the LED driver.The LED driver is connected with controller to control LED opening and closing, including enabled input, input end of clock and display input, for receiving enable signal and display data from controller respectively, the LED driver also includes multiple output ends for output display data, and multiple logic signal input ends, the logic signal input end receives the logical signal from the controller, further to control the opening and closing of LED driver.
Description
Technical field
It the utility model is related to LED display controls field, and in particular to a kind of LED driver for being used to control LED to be opened and closed
And the display device with the LED driver.
Background technology
Light emitting diode (LED) because it has excellent electric light transformation efficiency, and be widely used in it is various illumination and
Display field, the small light fixture to illumination at home, greatly to the advertisement exhibition board for being arranged on facade.Generally, LED is with driving
Constant electric current is delivered to LED to be driven to it by dynamic device (or driving chip) connection, driver.However, in some photographs
In bright device, often with multiple LED, it is necessary to by driver be connected to these LED with and meanwhile control these LED opening and closing.
Fig. 1 is the schematic diagram for the LED driver being currently widely used, and LED driver 100 has three signal input parts
A, B and C, control signal is received to receive 110 from coupled controller, and LED driver also has multiple output ends
OUT, to control the opening and closing of LED in LED array 120.For in the LED driver 100 shown in Fig. 1, it has 8 output ends
OUT, such as OUT1~OUT8, these output ends OUT can be respectively connecting to multiple LED in LED array 120, with according to from defeated
Enter to hold the control signal that A, B and C are received to control multiple LED opening and closing.For example, the signal received as input A, B and C
For " 000 " when, LED driver 100 opens the first output end OUT1 according to the signal, to control the LED works that are connected with OUT1
Make, or when the signal that input A, B and C are received is " 001 ", LED controller 100 is according to the signal by the second output end
OUT2 is opened, to control the LED operation being connected with OUT2, by that analogy, when the signal that input A, B and C are received is 111
When, LED controller 100 opens the 8th output end OUT8 according to the signal, to control the LED operation being connected with OUT8.Therefore,
Common LED driver 100 can control at most 8 LED opening and closing.
However, when needing to control more LED, generally require multiple LED drivers being connected in parallel use, therefore
In the display system for including multiple LED drivers in parallel, except needing controller and LED driver, may also it need
Extra control device is wanted to control the opening and closing of multiple LED drivers, this causes the installation work of correlation to become sufficiently complex.
Therefore, it is necessary to which a kind of LED driver, when using multiple LED drivers used in parallel, can reduce the complexity of wiring
Degree, can also control connected LED opening and closing simultaneously.
Utility model content
The purpose of this utility model is solve the problems, such as that above-mentioned multiple LED driver wirings are complicated.
In order to solve the above problems, the utility model discloses a kind of LED driver, can be connected with controller to control
LED opening and closing, the LED driver may include：
Enabled input, for receiving the enable signal from the controller；
Input end of clock, for receiving from the controller；
Input is shown, for receiving the display data from the controller；
Multiple output ends, for exporting the display data；And
Multiple logic signal input ends, for receiving the logical signal from the controller, described in further controlling
LED driver is opened and closed.
Above-mentioned LED driver, it is only controlled the opening and closing of the LED driver by the logical signal.
Above-mentioned LED driver, wherein the logical signal is for first level signal or different from the first level signal
The second horizontal signal, when the logical signal each received in the multiple logic signal input end is described
During one horizontal signal, the LED driver is opened.
Above-mentioned LED driver, wherein the display input can sequentially receive multiple display datas, and the multiple output
End can sequentially export each in the multiple display data.
Above-mentioned LED driver, may also include register, for storing the multiple display data, and will be the multiple aobvious
Registration is each assigned to the corresponding display output end in.
Above-mentioned LED driver, wherein the quantity of the multiple output end is 8.
Above-mentioned LED driver, it one of meets in following content：
The display input receives the display data in the rising edge of the clock signal；
The display input receives the display data in the trailing edge of the clock signal；
The display input receives the display data in the rising edge and trailing edge of the clock signal.
The invention also discloses a kind of LED display, including：
Controller, wherein the controller includes:
Enabled output end, for exporting enable signal；
Output terminal of clock, for exporting；
Display output end, for output display data；And
Multiple logical signal output ends, for output logic signal；
LED array；
Multiple LED drivers described above, the output end of each of which LED driver are coupled to LED array；And
Logic array, the logic array include：
Multiple logic input terminals, coupled with the multiple logical signal output end；And
Multigroup logic output terminal, every group of institute for being coupled to the corresponding LED driver of multigroup logic output terminal
State logic signal input end.
Above-mentioned LED display, wherein the logic array also includes multiple reverse units, in the logic output terminal
A part can be connected by the reversely unit with the logic output terminal.
Above-mentioned LED display, wherein the group number of multigroup logic output terminal is 2N, wherein N is the multiple logic
The quantity of signal output part, and the quantity of the multiple LED driver is not more than described group of number of multigroup logic output terminal.
Brief description of the drawings
Fig. 1 is the schematic diagram of existing LED driver；
Fig. 2 is the schematic diagram of the LED driver of an embodiment of the present utility model；
Fig. 3 is the schematic diagram of the LED driver of another embodiment of the present utility model；
Fig. 4 is the schematic diagram of the LED display of an embodiment of the present utility model；
The schematic diagram of logic array in the LED display that Fig. 5 is Fig. 4.
Embodiment
The technical solution of the utility model is described in detail with reference to the accompanying drawings and detailed description.
As shown in Fig. 2 Fig. 2 shows the schematic diagram of LED driver 200 of the present utility model.Wherein, LED driver 200
With multiple output ends, such as in the embodiment shown in figure 2, LED driver has 8 output end OUT1~OUT8.When
So, in other embodiments, output end can also be other quantity, these output ends respectively with LED array (not shown)
Multiple LED be connected, to control these LED opening and closing.
Meanwhile LED driver also has the Enable Pin BK being connected with controller 210, input end of clock LCK, display input
Hold DIN and multiple logical signal output end OUT1~OUT8.Wherein, Enable Pin BK is used to receive and made from controller 210
Can signal, such as in some embodiments, enable signal can be level signal, (the example when the level signal is low level
Such as 0V-1V), LED driver 200 is closed, and when the level signal is high level (such as 2.5-5V), LED driver is opened,
By multiple output end OUT1~OUT8 of LED driver 200 signal output will be shown to connected LED array.When
So, in other embodiments, LED driver can also be opened when enable signal is low level, and is height in enable signal
During level, LED driver is closed.In other embodiments, the enable signal can also be binary data signal or
Other have any signal of two states.
Show that input DIN is used to receive display data from controller, and display data is exported into multiple output ends
One of them, in some embodiments, the display data can be binary data signal, when display data is
When " 0 ", the control of LED driver 200 is extinguished with the LED of corresponding output end connection, and side is when display data is " 1 ", LED driver
200 controls are lighted with the LED of corresponding output end connection.In some other embodiment, the display data can also be tool
The current value of body, to control LED brightness.
Input end of clock LCK be used for from controller 210 receive fixation clock signal, in other embodiments, this when
Clock signal can be from the clock generating circuit of outside.In a specific embodiment, LED driver 200 connects from controller 210
Display data is received, for example, LED driver 200 can receive in the rising edge of the clock signal from controller 210 once shows number
According to, or in the trailing edge of the clock signal display data is received from controller 210, and or in the clock signal
Rising edge and trailing edge from controller 210 receive a display data.
Below so that LED driver 200 is in the rising edge of clock signal as an example, illustrate LED driver 200 is how to receive to show
Registration is according to simultaneously output display data.In a specific embodiment, LED driver 200 by the display data received every time according to
It is secondary to be exported from multiple output ends to LED array.Specifically, in first rising edge of clock signal, and enable signal is to make
During the signal that LED driver enables, LED driver 200 receives first display signal from display input DIN, and opens and show
Show input DIN and output end OUT1 transmission channel, display data is exported from output end OUT1, the of clock signal
Two rising edges, and when enable signal is the signal for making LED driver enabled, LED driver 200 connects from display input DIN
Second display signal is received, and opens display input DIN and output end OUT2 transmission channel, by display data from output
OUT2 outputs are held, by that analogy, in the 8th rising edge of clock signal, and enable signal is the letter for making LED driver enabled
Number when, LED driver 200 from display input DIN receive the 8th display signal, and open display input DIN with output
OUT8 transmission channel is held, display data is exported from output end OUT8.Afterwards, the next (that is, the 9th of clock signal the
It is individual) rising edge, and when enable signal is the signal for making LED driver enabled, LED driver 200 reopens display input
DIN and output end OUT1 transmission channel, display data is exported from output end OUT1 again, so as to update OUT1 outputs
Display data.In this way, LED driver is according to clock signal and enable signal, by the display data received constantly from
Output end Sequential output, and the display data to being exported from output end is updated.
In addition, LED driver 200 further has multiple logic signal input end EN.For example, in the LED shown in Fig. 2
In driver 200, there are 2 logic signal input ends EN1 and EN2, and logical signal is received further to control from controller
The opening and closing of LED driver 200.In a specific embodiment, only when the logic that logic signal input end EN1 and EN2 are received
When signal is " 1 ", LED driver 200 is just enabled, conversely, the logic received as logic signal input end EN1 and EN2
As long as signal has one when being " 0 ", LED driver 200 is closed.With reference to above-mentioned Enable Pin BK, in some embodiments, logic
Signal input part EN and Enable Pin BK collective effects, to control the enabled of LED driver 200, i.e., as logic signal input end EN
When the enable signal that the logical signal received is " 1 " and Enable Pin BK is received also is high level signal or " 1 ", LED drives
Dynamic device 200 is just enabled.
It should be appreciated that although Fig. 2 is not shown, also there is LED driver 200 power end VDD to be connect from supply unit
Receive electric power, and earth terminal GND.
Referring to Fig. 3, Fig. 3 shows the schematic diagram of LED driver 300 of the present utility model, LED driver 300 and Fig. 2
The difference of LED driver 200 be that LED driver 300 no longer has Enable Pin BK, but directly defeated according to logical signal
Enter to hold the logical signal that EN1 and EN2 is received to control the opening and closing of LED driver 300.Posted in addition, LED driver 300 also has
Storage 320, in LED driver 300, display input DIN is by the display data transmissions received at controller 310 to posting
The display data received is assigned to output end OUT1~OUT8 by storage 320, register 320 again, in some embodiments,
Register 300 is shift register.Specifically, in first rising edge of clock signal, and logical signal makes LED driver
300 it is enabled when, LED driver 300 by receive first display data transmissions into register 320, and register 320
The first passage that is connected with output end OUT1 is opened with by display data transmissions to output end OUT1.Then, in clock signal
Second rising edge, and when logical signal enables LED driver 300, second display number that LED driver 300 receives
According to being transferred in register 320, and register 320 opens the second channel that is connected with output end OUT2 so that display data to be passed
It is defeated to arrive output end OUT2, simultaneously as first display data that LED driver 300 receives still is stored in register 320
In, therefore, while register 320 transmits second display data received by second channel to output end OUT2 still
Constantly by first passage by receive first display data transmissions to output end OUT1.Similarly, in clock signal
8th rising edge, and when logical signal enables LED driver 300, LED driver 300 is by the receive the 8th display
Data transfer is into register 320, and register 320 opens the 8th passage that is connected with output end OUT8 with by display data
Be transferred to output end OUT8, meanwhile, register 320 remains in that the display data received before, and respectively by first~
Seven channel transfers, until in display data transmissions circulation afterwards, are stored in register 320 to output end OUT1~OUT7
Display data be updated untill.Therefore, because LED memories are due to register 320, and realize display data
The function of " go here and there into and go out ", so as to which LED driver 300 can be when receiving display data, while to all output each time
Hold the corresponding display data of parallel output.
Referring to Fig. 4, Fig. 4 shows the schematic diagram of LED display 400 of the present utility model, wherein LED display
400 are parallel with 4 LED driver 410A~410D.LED driver 410A~410D is identical with the LED driver 200 in Fig. 2,
The LED driver 300 in Fig. 3 can also be used when heat.LED driver 410A~410D enabled input BK, input end of clock LCK
The enabled output end BKo of controller 420, all the time output end LCKo and display output are respectively connecting to display input DIN
Hold DINo.LED driver 410A~410D all output ends and multiple LED in LED array 440 simultaneously.In addition, controller
Logical signal output end EN1' and EN2' be connected to logic array 430 with by logic signal transmission to logic array 430, logic
After array 430 handles logical signal, LED driver 410A~410D is being transmitted separately to.
The partial schematic diagram of logic array 430 represents in Figure 5.Fig. 4 and Fig. 5 is referred to simultaneously, although for brevity,
Logic array 430 is shown as its logic output terminal EN1 " and EN2 " and is connected with LED driver 410A~410D in Fig. 4.But have
For body, in Figure 5, logic array 430 has 4 groups of logic output terminals, and first group of logic exports single EN1 " _ 1 and EN2 " _ 1 and connected
LED driver 410A is connected to, second group of logic exports single EN1 " _ 2 and EN2 " _ 2 and be connected to LED driver 410B, and the 3rd group is patrolled
Collect the single EN1 " _ 3 and EN2 " _ 3 of output and be connected to LED driver 410C, the 4th group of logic exports single EN1 " _ 4 and EN2 " _ 4 connection
To LED driver 410D.Logic array 430 also has multiple reversely units 431, and logic input terminal EN1' and EN2' can be by anti-
Logic output terminal is connected to unit 431, directly can be also connected with logic output terminal.Such as shown in figure 5, logic output terminal
EN1 " _ 2, EN2 " _ 3, EN1 " _ 4 and EN2 " _ 4 are connected by reverse unit 431 with logic input terminal, and remaining logic exports
End is directly connected to logic input terminal.The effect of reverse unit 431 is that logical signal is transformed to opposite signal, if such as working as
When the logical signal of " 0 " is inputted to reverse unit 431, reverse unit will export the signal of " 1 ", and vice versa.Therefore, logic is worked as
Array 430 from the logical signal that controller 420 receives be " 11 " when, it is defeated that only first group of logic exports single EN1 " _ 1 and EN2 " _ 1
Go out the signal of " 11 ", therefore only LED driver 410A is enabled.Similarly, when the logical signal that logic array 430 receives is
When " 01 ", only second group of logic exports the signal of single EN1 " _ 2 and EN2 " _ 2 output " 11 ", therefore only LED driver 410B
It is enabled, when the logical signal that logic array 430 receives is " 10 ", only the 3rd group of logic exports single EN1 " _ 3 and EN2 " _ 3
The signal of " 11 " is exported, therefore only LED driver 410C is enabled, and when the logical signal that logic array 430 receives is
When " 00 ", only the 4th group of logic exports the signal of single EN1 " _ 4 and EN2 " _ 4 output " 11 ", therefore only LED driver 410D
It is enabled.Thus mode, logic array 430 sequentially respectively can open LED driver 410A~410D according to logical signal, i.e.,
The data output to whole LED array can be completed.
Therefore, when using LED driver provided by the utility model, a controller can control 4 LED simultaneously
The opening and closing of driver need not introduce extra element to control the opening and closing of each LED driver, and this greatly reduces answering for wiring
Miscellaneous degree.Although in the LED display 400 shown in Fig. 4 and Fig. 5, controller 410 only export two-way logical signal control to
More 4 LED drivers 410, although it will be appreciated that, controller 410 can produce the logical signal of more multichannel to control more
More LED driver, for example, when controller 410 exports 3 tunnel control signal, LED driver 410 can be also configured to
3 road logical signals are received, while logic array 430 can also be configured to receive and handle this 3 road logical signal, and export 23,
That is the logical signal after 8 groups of processing, in other words, when controller 410 exports 3 tunnel control signal, it can control at most 8 simultaneously
The opening and closing of individual LED driver.
The above is only better embodiment of the present utility model, and any those familiar with ordinary skill in the art can root
Various change and modification are carried out according to design of the present utility model, but these changes and modification should all belong to and fall into guarantor of the present utility model
Scope is protected, the scope of protection of the utility model is determined by appended claims.
Claims (10)
1. a kind of LED driver, it is connected with controller to control LED opening and closing, it is characterised in that the LED driver includes：
Enabled input, for receiving the enable signal from the controller；
Input end of clock, for receiving the clock signal from the controller；
Input is shown, for receiving the display data from the controller；
Multiple output ends, for exporting the display data；And
Multiple logic signal input ends, for receiving the logical signal from the controller, further to control the LED to drive
Dynamic device opening and closing.
2. LED driver according to claim 1, it is characterised in that only control the LED to drive by the logical signal
The opening and closing of device.
3. LED driver according to claim 1, it is characterised in that the logical signal is for first level signal or not
The second horizontal signal of the first level signal is same as, wherein when each being received in the multiple logic signal input end
Logical signal when being the first level signal, the LED driver is opened.
4. LED driver according to claim 1, it is characterised in that the display input order receives multiple displays
Data, and the multiple output end sequentially export it is each in the multiple display data.
5. LED driver according to claim 4, it is characterised in that the multiple aobvious for storing also including register
Registration evidence, and will each be assigned to the corresponding display output end in the multiple display data.
6. LED driver according to claim 1, it is characterised in that the quantity of the multiple output end is 8.
7. LED driver according to claim 1, it is characterised in that the LED driver meets its in following content
One of：
The display input receives the display data in the rising edge of the clock signal；
The display input receives the display data in the trailing edge of the clock signal；
The display input receives the display data in the rising edge and trailing edge of the clock signal.
A kind of 8. LED display, it is characterised in that including：
Controller, the controller include:
Enabled output end, for exporting enable signal；
Output terminal of clock, for exporting；
Display output end, for output display data；And
Multiple logical signal output ends, for output logic signal；
LED array；
Multiple LED drivers, the LED driver is the LED driver described in claim any one of 1-7, wherein each institute
The output end for stating LED driver is coupled to the LED array；And
Logic array, the logic array include：
Multiple logic input terminals, coupled with the multiple logical signal output end；And
Multigroup logic output terminal, every group of multigroup logic output terminal be coupled to corresponding to the described of the LED driver patrol
Collect signal input part.
9. LED display according to claim 8, it is characterised in that the logic array also includes multiple reversely single
Member, the part in the logic output terminal are connected by the reversely unit with the logic output terminal.
10. LED display according to claim 8, it is characterised in that the group number of multigroup logic output terminal is 2N,
Wherein N is the quantity of the multiple logical signal output end, and the quantity of the multiple LED driver is not more than described multigroup patrol
Collect described group of number of output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090810.6U CN207097425U (en) | 2017-08-29 | 2017-08-29 | A kind of LED driver and LED display |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721090810.6U CN207097425U (en) | 2017-08-29 | 2017-08-29 | A kind of LED driver and LED display |
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| CN207097425U true CN207097425U (en) | 2018-03-13 |
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| CN201721090810.6U Active CN207097425U (en) | 2017-08-29 | 2017-08-29 | A kind of LED driver and LED display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179814A (en) * | 2020-01-06 | 2020-05-19 | 深圳市联诚发科技股份有限公司 | Driving device and driving method of LED array and display system |
| CN113724646A (en) * | 2021-09-01 | 2021-11-30 | 北京芯格诺微电子有限公司 | Drive control method and device for LED display screen |
-
2017
- 2017-08-29 CN CN201721090810.6U patent/CN207097425U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111179814A (en) * | 2020-01-06 | 2020-05-19 | 深圳市联诚发科技股份有限公司 | Driving device and driving method of LED array and display system |
| CN111179814B (en) * | 2020-01-06 | 2021-03-30 | 深圳市联诚发科技股份有限公司 | Driving device and driving method of LED array and display system |
| CN113724646A (en) * | 2021-09-01 | 2021-11-30 | 北京芯格诺微电子有限公司 | Drive control method and device for LED display screen |
| WO2023030113A1 (en) * | 2021-09-01 | 2023-03-09 | 北京芯格诺微电子有限公司 | Driving control method and device for led display screen |
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